#include<iostream>
#include<algorithm>
#include<cmath>
using namespace std;
int main()
{
	int a,b=0;
	cin>>a;
	while(a!=0)
	{
		b=b*10+a%10;
		a/=10;
	}
	cout<<b<<endl;
	system("pause");
	return 0; 
}
